Part A Government Exam Flashcards

If the loads on a beam can be considered to be concentrated at specific points, they are called:

Point loads

Work used to overcome friction can be considered as:

Wasted work

What are two advantages of chain drives?

The gears don’t have to mesh together, and a positive drive can be obtained over a longer distance

Where in an object does the pyrometer measure its temperature?

At the surface of the object

True or false: Pyrometers are stronger than and therefore are more suited for high temperatures than other kinds of thermometers.

True

The transfer of heat by conduction involves:

Direct contact of materials

What makes materials with high density good heat conductors?

They have closely packed molecules

The transfer of heat by convection involves:

The movement of matter between materials

As fluid becomes hotter, it ______ in volume and ______ in density.

expands, decreases

Why is stagnant air a good insulator?

It has fairly low conductivity

Why is stopping convection more effective than using insulation?

Because gas is a poor insulator

What are some examples of insulating materials?

Fibreglass, styrofoam, cellulose fibre

When are parallel flow heat exchangers useful?

When two fluids must be brought to nearly the same outlet temperature

Why is the heat transfer roughly the same at the inlets and outlets of the counter flow heat exchanger?

Because the temperature differential remains consistent throughout

What advantages does the counter flow exchanger have over the parallel flow exchanger?

Reduced risk of material failure

The initially colder fluid can be raised to a higher temperature

Has a steadier rate of heat transfer

Which heat exchanger arrangement do boilers and utility steam generators most often have?

Combined cross-counter flow

In the boiler section, most of the heat is transferred by:

Radiation

If considering only convection heat transfer in the boiler, the boiler section has a ________ flow.

Parallel

If considering only radiant heat transfer in the boiler, the boiler section has a ________ flow.

Cross

Single row HVAC coils are _______ flow.

Cross

Multiple row HVAC coils are either ________ or _________.

cross-counter, cross-parallel

The heat transfer surface of a bare tube heat exchanger can be considered to be the _________ of the tube.

Outside surface area

The only way to vary the rate of heat transfer is to modify the ______ of the tube.

Length

Most boiler tubes are ________ heat exchangers.

Bare pipe

What can be added to tubes to increase their heat transfer surface and ability?

Fins

What are some factors that limit to the number of fins that can be used on the heat exchanger?

Resistance to external flow, and susceptibility to fouling

What is the most common type of heat exchanger?

Shell-and-tube

What is an important feature of shell-and-tube heat exchangers, and what does it do?

The head partition, it directs the fluid through the tubes and keeps fluid from entering the outlet directly

What is a disadvantage of the U-tube heat exchanger?

It’s difficult to clean

What is a disadvantage of the shell-and-coil heat exchanger?

They are impossible to clean mechanically

What happens if a heater does not have a steam outlet?

Heater would fill up with condensate

What happens if a heater does not have a steam trap?

Steam would flow directly to the condensate tank

Power Engineering and Pressure Plant regulation are under __________ jurisdiction.

Provincial

If the bill successfully passes _______ readings, all members of the Legislature vote on the bill.

Three

Regulations are made by the:

Lieutenant Governor

Exemptions from the legislation may exist due to:

Too small equipment, may be under another provincial act, or federal/municipal jurisdiction

What must someone have to be able to advance to the next class of certification?

Certificate, education, work experience, completion of govt exams

To standardize requirements across Canada, it is simpler for Jurisdictions to:

Adopt existing codes

Why would Jurisdictions adopt existing codes?

Eliminates duplication and makes regulations more responsive to technological changes

Standards are issued by:

National and international organizations

How often is the CSA B52 Code revised?

Every 3 to 5 years

What types of occupancy does CSA B52’s occupancy classification cover?

Commercial, institutional, industrial, residential, public assembly

How does the refrigerant classification work? If one refrigerant is classified as A3 and one as B2, what does that mean?

1: Least flammable. 3: Most flammable.

A: Least toxic. B: Most toxic

A3: Least toxic, most flammable

B2: Most toxic, mid-flammable

The overpressure protection section of the CSA B52 Code also includes:

Pressure limit controls and pressure relief valve installation

In regards to pressure relief valve installation, what does CSA B52 cover?

Set points, capacities, discharge piping, rupture disk, and fusible plug

What are some topics that the mandatory appendices cover?

SI units, thin areas in shells and heads, additional rules for boilers made by riveting

What are the main hazards related with the operation of smaller, automatically fired boilers?

Low water, overpressure, over-temperature, furnace explosion

Why are small boilers a greater risk to the public than larger ones?

They are the most common and automatically fired

CSD-1 covers automatically fired:

Hot water and low pressure steam heating boilers

High pressure steam power boilers

Boilers under _______ kJ per hour input may also be recognized as meeting CSD-1.

422,022

True or false: Water can bypass the low water cut-off if it falls below the lowest visible range.

False; the low water cut-off must never be bypassed.

Each automatically fired low-pressure steam system should have at least ____ low-water fuel cut-offs.

Two

Each automatically fired high-pressure steam system should have at least ____ low-water fuel cut-offs.

Two

According to CW-210, coil-type tubular boilers are permitted to have:

A flow switch

The requirements of Part CF depend on the _______ of the burner.

Input rating

CF-310 describes the:

Primary safety control

CSD-1 does not apply to boilers larger in capacity than _____ hw.

300

In cases where a serious or fatal injury occurs, an OHS officer will want to determine:

Who was responsible for site conditions, contractors, and what were the arrangements for health and safety concerns

What are some hazards that are present in the workplace?

Hot surfaces, chemicals, mists, fumes, explosive fuels, pressurized vessels, high voltage electricity

Hearing protection must be worn when sound pressure levels are _____ dB or higher.

80

Some boots offer additional metatarsal protection to:

Protect the top of the foot from impact

The majority of protective footwear has __________ soles.

Oil and acid-resistant

When wearing a lanyard that doesn’t have a shock absorber, the fall must not exceed _____ m.

1\.2

When wearing a lanyard that has a shock absorber, the fall can be up to _____ m.

2

When is the atmosphere considered to be of insufficient oxygen?

Less than 19.5% oxygen

When deciding what type of respiratory protective equipment to use, what considerations should be made?

Nature/warning properties of contaminants

Need for mobility and emergency escape

Oxygen content

Duration of workers’ exposure

How can respiratory equipment undergo inspection?

Fit testing, and verifying that the apparatus is properly pressurized

A significant mist hazard is associated with:

Cooling tower operation

What limits do air-purifying respirators have?

They don’t completely eliminate exposure

They don’t supply oxygen and can’t be used in IDLH

They can’t be used where chemicals have poor warning signs

What is an advantage of the powered air-purifying respirator?

Positive pressure is maintained under the facepiece

The SCBA and SABA both use:

Compressed breathing air

An SCBA equipped with a 60-minute cylinder is about ____ kg heavier than one equipped with a 30-minute cylinder.

5

What are cylinders (SCBA) made of?

Aluminum, wrapped in fibreglass or carbon fibre

How do carbon fibre cylinders compare to fibreglass?

Carbon fibre wrapped cylinders are lighter, but are more costly

The escape cylinder provides _____ minutes of emergency escape breathing air.

5 to 15

How are SARs different from SABAs?

They do not have escape air cylinders

When an accident happens, who usually reports the incident?

The person involved in the incident, or an observer

What are leading indicators?

They measure the initiatives taken to reduce health and safety incidents

What are lagging indicators?

They help to analyze the severity of health and safety incidents

Where is H2S prevalent?

Oil and gas fields

Septic tanks

Manure pits

Anywhere bacteria can break down organic matter

What’s the difference between H2S Aware and H2S Alive?

H2S Aware is the minimum, while H2S Alive includes rescue procedures

If there are ____ or more employees working at the same time, there should be a first aid attendant.

Six

When are SWPs not issued?

Before starting the lockout process

Why are devices like phones and lasers not intrisically safe?

Their wiring has limited protection against sparks and ignition

An excavation SWP allows digging or tunneling ____ cm below the ground.

30

What is a car seal?

A one-time seal, made of steel cable or plastic, stamped with a unique number

What can be used to help identify the owner of a lock?

A unique number and a “Do Not Operate” tag, both on the lock

How many operators usually perform the actual group lookout?

Two

What is the goal of the GHS?

To adopt and use the same set of rules for classifying hazards

WHMIS consists of which four components?

Hazard identification, labelling, SDS, training

Suppliers of hazardous products are required to:

Classify products and provide SDS

When utilizing hazardous products in the workplace, employers must:

Ensure products are labelled, have an SDS sheet, train workers

When hazardous products are present, workers must:

Participate in training, protect themselves, ensure labels are in good condition

How do workplace labels compare to supplier labels?

They are much simpler and contain only basic information

When are workplace labels required?

If a supplier label is damaged or if hazardous material is poured into a different container

Who is responsible for preparing the SDS?

The employer

How is a cylinder safely handled?

Don’t drop or roll, and keep it upright with the metal cap on

What must an operator do with a cylinder if they suspect it’s damaged?

They must take it out of service and dispose of it

Acetylene and oxygen cylinders must be stored ____ metres apart.

6

Why must acetylene and oxygen cylinders be stored apart?

To prevent explosive mixtures forming in the event of leakage